// 设置常见的屏幕尺寸
// 我们此次定义放分数为15
// 一定要写在最上面
a {
    text-decoration: none;
}
html {
    font-size: 50px;
}
@no: 15;
// 320
@media screen and (min-width: 320px) {
    html { 
        font-size:(320px / @no) ;
    }
}
//360
@media screen and (min-width: 360px) {
    html {
        font-size:(360px / @no) ;
    }
}
//375 iphone 678
@media screen and (min-width: 375px) {
    html {
        font-size:(375px / @no) ;
    }
}
//384
@media screen and (min-width: 384px) {
    html {
        font-size:(384px / @no) ;
    }
}
//400
@media screen and (min-width: 400px) {
    html {
        font-size:(400px / @no) ;
    }
}
//414
@media screen and (min-width: 414px) {
    html {
        font-size:(414px / @no) ;
    }
}
//424
@media screen and (min-width: 424px){
    html{
        font-size:(424px / @no) ;
    }
}
//480
@media screen and (min-width: 480px){
    html{
        font-size:(480px / @no) ;
    }
}
//540
@media screen and (min-width: 540px){
    html{
        font-size:(540px / @no) ;
    }
}
//720
@media screen and (min-width: 720px){
    html{
        font-size:(720px / @no) ;
    }
}
//750
@media screen and (min-width: 750px){
    html{
        font-size:(750px / @no) ;
    }
}